2,2-bis(hydroxymethyl)propionic acid

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2006-10-13

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

comparable to guideline study

Remarks:

The pendant drop method used in this study is comparable to the ring method OECD 115 since good correlation has been identified.

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Version / remarks:

Pendant drop method used

Deviations:

yes

Remarks:

pendant drop model used

Principles of method if other than guideline:

The surface tension analyses on water solutions were performed with a contact angle meter instrument according to the principle pendant drop. An internal method (A1577) was used. The results from this method have been compared with results obtained with the ring method described in guideline OECD 115. Good correlation was found between the pendant drop method (A1577) and the ring method.

GLP compliance:

no

Type of method:

other: Pendant drop

Specific details on test material used for the study:

- Analytical purity: > 98% GC purity
- Lot/batch No.: 561058
- Storage condition of test material: room temperature

Key result

Surface tension:

72 mN/m

Temp.:

20 °C

Conc.:

1 g/L

Conclusions:

The surface tension of Bis-MPA is 72 mN/m at 20°C (not surface-active).

Executive summary:

Using the pendant drop method, which was shown to be in good correlation to the ring method described in OECD 115, the surface tension of Bis-MPA was determined as 72 mN/m at 20 °C.

Description of key information

Using the pendant drop method, which was shown to be in good correlation to the ring method described in OECD 115, the surface tension of Bis-MPA was determined as 72 mN/m at 20 °C.

The substance is not surface-active.

Key value for chemical safety assessment

Surface tension:

72

in mN/m at 20°C and concentration in mg/L:

1 000